Transcript for Wife Pushes New Husband Over Cliff 8 Days After Wedding

First, the story of the new bride charged with murdering her husband after a week of marriage. Jordan lynn graham has confessed to pushing her husband off a cliff in montana. Now, she's in federal court, facing life in prison. Ryan owens has the story. Reporter: When codecy johnson said until death do us part, little did he know his death would come just a week later. This morning, 22-year-old jordan lynn graham will be back in a federal courtroom in montana, facing second-degree murder charges. Almost positive that jordan had done something or somehow or someway was a part of what happened to cody. Reporter: Friends of the 25-year-old victim say they warned him, his new bride was trouble. When cody told me he was going to propose to jordan, i wasn't real supportive of it. I did have a conversation with him saying that, I think he should, you know, reconsider. Reporter: But the two love BIRDS WED JUNE 29th. Here is the invitation. Investigators say a mere eight days later, the new couple went through a walk through montana's glacier national park. Graham told her friends she was already having second thoughts about the marriage and planned to tell him. I'm about to talk to him, she texted a friend that day, according to court documents. I'll pray for you guys. Graham wrote back, but dead serious, if you don't hear from me at all again tonight, something happened. Something happened, all right. As the couple neared the top of the cliff, their argument got heated. Graham told the fbi, her husband grabbed her arm. Then, graham stated, she could have just walked away. But due to her anger, she pushed johnson with both hands in the back. And as a result, he fell face-first off the cliff. Graham's friends cannot believe she's capable of murder. I never, ever expected her to be capable of hurting someone to that degree. I mean, especially someone who would worship her. And he would have given her anything. Reporter: But fbi agents say she not only committed the crime but the cover-up. First, telling authorities she last saw her husband in the backseat of the car, leaving their driveway. Days later, graham called authorities to report she found her husband dead at the bottom of that cliff. The park ranger commented, it was an odd place to locate a body. According to court documents, the new bride and even newer widow responded. It was a place he wanted to see before he died. For "good morning america," ryan owen, abc news, dallas. And joining us now with more on the case is abc's chief legal affairs anchor, dan abrams. She confessed to killing her husband. And the big problem, though, is the lie that she told. Right? If she had said, we were up on the top of a mountain. And we got into a little bit of an altercation. And the next thing I know, i pushed him and he falls off a cliff, I don't think she'd be charged with murder. The problem is, she came into this case saying, the last time I saw him, he was being taken away in a car. And she's the one that finds the body at the bottom. Then, later she makes this confession, where she says she pushed him. I think that's the reason she's charged with murder here. Could there be a plea deal? I think there will be. This is someone, it sounds like, according to the authorities, has confessed. Second-degree murder, an aggressive charge in connection, with these sorts of facts. I wouldn't be surprised if her lawyers try to get her an involuntary manslaughter or manslaughter charge, which could have her serve limited time behind bars. Explain to everyone why it's being held in federal court. Because it was in a national park. When a crime occurs in a national park, it goes to federal court, as opposed to state court. And the text message we saw in the piece. Yeah. You would think it might go to premeditation except seihe's not saying I'm going to do something to him. It sounds like she's saying, he's going to do something to me. It makes it clear that there were issues. It makes it clear that the two of them were having real problems, which is probably another reason why the authorities here decided to pursue a murder charge. We'll see what happens, as always.

This transcript has been automatically generated and may not be 100% accurate.

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